There is Debugging mode?
Talk:VisualEditor/Debugging
Appearance
There is no ve.instances so none of these work anymore.
I think @DLynch (WMF)'s subsequent edit has fixed most of these.
… and https://www.mediawiki.org/w/index.php?title=VisualEditor/Debugging&diff=2540743&oldid=2539505 should mean the rest now work too. I hope. :-)
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